CVE-2022-49153
wireguard: socket: free skb in send6 when ipv6 is disabled
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: wireguard: socket: free skb in send6 when ipv6 is disabled I got a memory leak report: unreferenced object 0xffff8881191fc040 (size 232): comm "kworker/u17:0", pid 23193, jiffies 4295238848 (age 3464.870s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff814c3ef4>] slab_post_alloc_hook+0x84/0x3b0 [<ffffffff814c8977>] kmem_cache_alloc_node+0x167/0x340 [<ffffffff832974fb>] __alloc_skb+0x1db/0x200 [<ffffffff82612b5d>] wg_socket_send_buffer_to_peer+0x3d/0xc0 [<ffffffff8260e94a>] wg_packet_send_handshake_initiation+0xfa/0x110 [<ffffffff8260ec81>] wg_packet_handshake_send_worker+0x21/0x30 [<ffffffff8119c558>] process_one_work+0x2e8/0x770 [<ffffffff8119ca2a>] worker_thread+0x4a/0x4b0 [<ffffffff811a88e0>] kthread+0x120/0x160 [<ffffffff8100242f>] ret_from_fork+0x1f/0x30 In function wg_socket_send_buffer_as_reply_to_skb() or wg_socket_send_ buffer_to_peer(), the semantics of send6() is required to free skb. But when CONFIG_IPV6 is disable, kfree_skb() is missing. This patch adds it to fix this bug.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected e7096c131e5161fa3b8e52a650d7719d2857adfd – < 096f9d35cac0a0c95ffafc00db84786b665a4837
- affected e7096c131e5161fa3b8e52a650d7719d2857adfd – < 402991a9771587acc2947cf6c4d689c5397f2258
- affected e7096c131e5161fa3b8e52a650d7719d2857adfd – < ebcc492f4ba14bae54b898f1016a37b4282558d1
- affected e7096c131e5161fa3b8e52a650d7719d2857adfd – < 0b19bcb753dbfb74710d12bb2761ec5ed706c726
- affected e7096c131e5161fa3b8e52a650d7719d2857adfd – < bbbf962d9460194993ee1943a793a0a0af4a7fbf
- affected 5.6
- unaffected < 5.6
- unaffected 5.10.110 – ≤ 5.10.*
- unaffected 5.15.33 – ≤ 5.15.*
- unaffected 5.16.19 – ≤ 5.16.*
- unaffected 5.17.2 – ≤ 5.17.*
- unaffected 5.18 – ≤ *
References (5)
- https://git.kernel.org/stable/c/096f9d35cac0a0c95ffafc00db84786b665a4837 (opens in a new tab)
- https://git.kernel.org/stable/c/402991a9771587acc2947cf6c4d689c5397f2258 (opens in a new tab)
- https://git.kernel.org/stable/c/ebcc492f4ba14bae54b898f1016a37b4282558d1 (opens in a new tab)
- https://git.kernel.org/stable/c/0b19bcb753dbfb74710d12bb2761ec5ed706c726 (opens in a new tab)
- https://git.kernel.org/stable/c/bbbf962d9460194993ee1943a793a0a0af4a7fbf (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49153)Record last updated .